Resistors The accumulator’s electric resistor units can be factory-installed. The resistor material is high-quality Incoloy 825. The night electricity accumulator’s accessories include 2-3 electric resistors for nighttime use as well as daytime resistors. The delivery also includes thermostats for nighttime and daytime use, manufactured to comply with the Finnish Electricity Association’s drawing no. SLY 3.2, as well as a single overheating protector. If necessary the accumulator tank can be supplied with its own control panel. The accumulators’ electrification can also be carried out according to the customer’s preferences.